CN105776660A - Method for reinforcing water alga removal - Google Patents
Method for reinforcing water alga removal Download PDFInfo
- Publication number
- CN105776660A CN105776660A CN201610217803.1A CN201610217803A CN105776660A CN 105776660 A CN105776660 A CN 105776660A CN 201610217803 A CN201610217803 A CN 201610217803A CN 105776660 A CN105776660 A CN 105776660A
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- algae
- coagulant
- addition
- water body
- flocculation aid
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a method for reinforcing water alga removal. The H2O2 pre-oxidizing and coagulant polymerization aluminum chloride and coagulant aid and kieselguhr compounded enhanced coagulation sedimentation technology is adopted, and water algae are efficiently and stably removed through waterpower shearing by optimizing DO, pH and other parameters. The method has the advantages that a H2O2 pre-oxidizing and novel compound coagulant combination has the advantages of being excellent in alga removal performance, low in running cost, convenient to operate and the like, the alga removal process is high in safety, alga cells cannot be damaged, algal toxin release cannot be caused, especially various algae can be removed unselectively, and the removal effect is stable and excellent.
Description
Technical field
The present invention relates to a kind of method that fortified water body algae is removed, belong to water-treatment technology field.
Background technology
The growth of industrial wastewater and municipal sewage and the aggravation of widespread pollution from the overuse of fertilizers and pesticides in rural area, cause that water pollution problems is increasingly serious, and serious threat is to environment water water quality.Especially the discharge of the nutrient such as nitrogen phosphorus causes body eutrophication, not only causes algal bloom, Ecology balance to be destroyed, also causes water quality deterioration and bad smell to produce, serious harm masses' drinking water safety.Algae enters waterworks and can the properly functioning of purifier be adversely affected, and such as interference coagulation process, blocks filter, even penetrates filter tank entrance water supply network and causes that ductwork water quality worsens and piping corrosion.
Water environment controlling and removing algae technology generally includes biological restoration, filters air supporting and chemical oxidation etc..But, bioanalysis is used for the reparation of eutrophic water body, with low cost, but repair time is longer.Physical method includes direct filtration, membrane filtration and air supporting.Wherein, directly filter and most of algae can be retained well removal, but may result in the problems such as filter tank goes out blocking, filtering layer hardens, shorten filter cycle, increase backwash cost；Membrane filtration processes can effectively remove algae, but investment and operating cost substantially rise higher；Air supporting can overcome the problems such as little, the flco precipitation difficulty of algae density, but typically requires coagulation process as pretreatment, needs new construction of structures simultaneously, increases investment and operating cost, and air-flotation scum is often difficult to process.Chemical method mainly has algicide (copper sulfate), oxidation etc., it is easily caused frustule disintegration and causes the problems such as Algae toxins release, disinfection byproduct (DBP) yield increase, there is drinking water safety hidden danger, and oxidizing process is used alone and needs bigger chemical feeding quantity, and some high-level oxidation technology costs are very high.
Additionally, due to algae has the special construction such as the cellularity of similar vacuole and the flagellum of raising mobility, such as scalable natural buoyancy, its artificial settlement Control of more difficult realization.When adopting coagulation to remove former algae class, be difficult to by precipitate removed and algae easily from flco surface depart from, part algae Organic substance also can disturb coagulation process, complex is generated with metal coagulant, cause that metal ion residual quantity raises, so that by increasing chemical feeding quantity, cause cost to raise and removal effect be undesirable.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of method that fortified water body algae is removed, by optimised coagulation condition, enhanced coagulation effect, improve the removal efficiency of algae.
A kind of method that fortified water body algae is removed, step is as follows:
1) H is adopted2O2Pre-oxidation, preoxidation time is 2-10min, H2O2Addition is 5-30mg/L；
2) through coagulating kinetics, the pH of coagulating sedimentation is 7-9, and temperature is 15-30 DEG C, adopts hydraulic shear simultaneously, then stands；Described coagulating sedimentation adopts coagulant to be aluminium polychlorid, and flocculation aid is kieselguhr.
Described coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 1-5:1, and aluminium polychlorid addition is 10-60mg/L.
Described hydraulic shear is the alr mode that gradient is successively decreased, and is followed successively by 150-250r/min and quickly stirs 0.4-2min, 51-140r/min moderate-speed mixer 1-2min, 20-50r/min low rate mixing 7-15min, stands 0.2-1h afterwards.
The DO of described coagulating sedimentation is less than 6mg/L.
Beneficial effects of the present invention: H2O2Pre-oxidation and novel coagulation flocculation aid have the advantages such as operating cost is low, easy to operate；Technique is high except algae safety, typically not destruction frustule, will not cause Algae toxins release and algae removal does not have selectivity, multiple algae is had removal effect.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited to that.
Embodiment 1
Experimental group adopts H2O2Pre-oxidation, H2O2Addition is 5mg/L, preoxidation time is 2min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 3:1, and aluminium polychlorid addition is 30mg/L；Hydraulics is the alr mode that gradient is successively decreased, and is followed successively by 200r/min and quickly stirs 1min, 60r/min moderate-speed mixer 2min, 40r/min low rate mixing 15min, stands 0.4h afterwards；DO is 3mg/L, pH is 6, and temperature is 15 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 40mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 28.2%, higher than matched group algae removal rate 7.9%.
Embodiment 2
Experimental group adopts H2O2Pre-oxidation, H2O2Addition is 10mg/L, preoxidation time is 5min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 1:1, and aluminium polychlorid addition is 20mg/L；Hydraulics is the alr mode that gradient is successively decreased, and is followed successively by 250r/min and quickly stirs 0.4min, 100r/min moderate-speed mixer 1min, 40r/min low rate mixing 15min, stands 1h afterwards；DO is 3mg/L, pH is 8, and temperature is 30 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 40mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 88.8%, hence it is evident that higher than Routine control clearance 70%.
Embodiment 3
Adopt H2O2Pre-oxidation, H2O2Addition is 10mg/L, preoxidation time is 8min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 1.5:1, and aluminium polychlorid addition is 20mg/L；Hydraulic shear condition is the alr mode that gradient is successively decreased, and is followed successively by 200r/min and quickly stirs 0.4min, 60r/min moderate-speed mixer 2min, 40r/min low rate mixing 15min, stands 0.8h afterwards；DO is 3mg/L, pH is 7, and temperature is 30 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 34mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 86.3%, hence it is evident that higher than Routine control clearance 62.7%.
Embodiment 4
Adopt H2O2Pre-oxidation, H2O2Addition is 10mg/L, preoxidation time is 8min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 1:1, and aluminium polychlorid addition is 20mg/L；Hydraulics is the alr mode that gradient is successively decreased, and is followed successively by 200r/min and quickly stirs 0.4min, 80r/min moderate-speed mixer 2min, 40r/min low rate mixing 15min, stands 1h afterwards；DO is 3mg/L, pH is 7, and temperature is 30 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 40mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 90.3%, hence it is evident that higher than Routine control clearance 74.2%.
Embodiment 5
Adopt H2O2Pre-oxidation, H2O2Addition is 30mg/L, preoxidation time is 10min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 5:1, and aluminium polychlorid addition is 30mg/L；Hydraulics is the alr mode that gradient is successively decreased, and is followed successively by 150r/min and quickly stirs 2.0min, 51r/min moderate-speed mixer 2min, 20r/min low rate mixing 15min, stands 0.5h afterwards；DO is 5mg/L, pH is 8, and temperature is 30 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 36mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 84.2%, hence it is evident that higher than Routine control clearance 70.1%.
Embodiment 6
Adopt H2O2Pre-oxidation, H2O2Addition is 30mg/L, preoxidation time is 10min, carries out coagulating sedimentation afterwards, adds coagulant polymeric aluminium chloride and flocculation aid kieselguhr, service condition is: coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 5:1, and aluminium polychlorid addition is 30mg/L；Hydraulics is the alr mode that gradient is successively decreased, and is followed successively by 150r/min and quickly stirs 2.0min, 51r/min moderate-speed mixer 2min, 20r/min low rate mixing 15min, stands 0.2h afterwards；DO is 6mg/L, pH is 9, and temperature is 30 DEG C.Arranging matched group in implementation process, comparison is without H2O2Pre-oxidation, the coagulant added in precipitation process of coagulation is aluminium polychlorid, and addition is 36mg/L；All the other conditions are identical with described in front experimental group, and result obtains experimental group algae removal rate up to 67.2%, hence it is evident that higher than Routine control clearance 46.1%.
Claims (4)
1. the method that a fortified water body algae is removed, it is characterised in that step is as follows:
1) H is adopted2O2Pre-oxidation, preoxidation time is 2-10min, H2O2Addition is 5-30mg/L；
2) through coagulating kinetics, the pH of coagulating sedimentation is 7-9, and temperature is 15-30 DEG C, adopts hydraulic shear simultaneously, then stands；Described coagulating sedimentation adopts coagulant to be aluminium polychlorid, and flocculation aid is kieselguhr.
2. the method that fortified water body algae as claimed in claim 1 is removed, it is characterised in that described coagulant polymeric aluminium chloride and the diatomaceous interpolation mass ratio of flocculation aid are 1-5:1, and aluminium polychlorid addition is 10-60mg/L.
3. the method that fortified water body algae as claimed in claim 1 is removed, it is characterized in that, described hydraulic shear is the alr mode that gradient is successively decreased, it is followed successively by 150-250r/min and quickly stirs 0.4-2min, 51-140r/min moderate-speed mixer 1-2min, 20-50r/min low rate mixing 7-15min, stands 0.2-1h afterwards.
4. the method that fortified water body algae as claimed in claim 1 is removed, it is characterised in that the DO of described coagulating sedimentation is less than 6mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610217803.1A CN105776660A (en) | 2016-04-11 | 2016-04-11 | Method for reinforcing water alga removal |
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| CN201610217803.1A CN105776660A (en) | 2016-04-11 | 2016-04-11 | Method for reinforcing water alga removal |
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| CN105776660A true CN105776660A (en) | 2016-07-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107720915A (en) * | 2017-11-21 | 2018-02-23 | 山东建筑大学 | A kind of method of potassium peroxymonosulfate pre-oxidation coupling and intensifying coagulation purifying water body |
| CN107720914A (en) * | 2017-11-21 | 2018-02-23 | 山东建筑大学 | A kind of method using peroxycarbonate enhanced-coagulation |
| CN107892368A (en) * | 2017-11-21 | 2018-04-10 | 山东建筑大学 | A kind of method of potassium peroxymonosulfate enhanced-coagulation |
| CN109250839A (en) * | 2018-09-30 | 2019-01-22 | 江苏农林职业技术学院 | A method of using potassium permanganate and the combined reinforced coagulating treatment black and odorous water of diatomite |
| CN111573804A (en) * | 2020-05-18 | 2020-08-25 | 南京博斯特环保科技有限公司 | Medicament for fast blackening and deodorizing river channel and preparation method and application thereof |
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| CN101786745A (en) * | 2010-03-05 | 2010-07-28 | 泉州师范学院 | Emergent large and medium-sized natural water body algae pollution remediation technique capable of resisting light stormy waves |
| CN103588380A (en) * | 2013-11-15 | 2014-02-19 | 江苏绿威环保科技有限公司 | Algae mud deep dehydration method by utilizing strong oxidizing agent |
| CN104591360A (en) * | 2015-01-20 | 2015-05-06 | 河南城建学院 | Algicide and algae removing method capable of flocculating and quickly settling algae |
| CN105016524A (en) * | 2015-07-08 | 2015-11-04 | 中国科学院水生生物研究所 | Method for removing floating cladophora |
-
2016
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Patent Citations (4)
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| CN101786745A (en) * | 2010-03-05 | 2010-07-28 | 泉州师范学院 | Emergent large and medium-sized natural water body algae pollution remediation technique capable of resisting light stormy waves |
| CN103588380A (en) * | 2013-11-15 | 2014-02-19 | 江苏绿威环保科技有限公司 | Algae mud deep dehydration method by utilizing strong oxidizing agent |
| CN104591360A (en) * | 2015-01-20 | 2015-05-06 | 河南城建学院 | Algicide and algae removing method capable of flocculating and quickly settling algae |
| CN105016524A (en) * | 2015-07-08 | 2015-11-04 | 中国科学院水生生物研究所 | Method for removing floating cladophora |
Non-Patent Citations (3)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107720915A (en) * | 2017-11-21 | 2018-02-23 | 山东建筑大学 | A kind of method of potassium peroxymonosulfate pre-oxidation coupling and intensifying coagulation purifying water body |
| CN107720914A (en) * | 2017-11-21 | 2018-02-23 | 山东建筑大学 | A kind of method using peroxycarbonate enhanced-coagulation |
| CN107892368A (en) * | 2017-11-21 | 2018-04-10 | 山东建筑大学 | A kind of method of potassium peroxymonosulfate enhanced-coagulation |
| CN107720914B (en) * | 2017-11-21 | 2020-06-23 | 山东建筑大学 | Method for removing algae by using peroxycarbonate to strengthen coagulation |
| CN109250839A (en) * | 2018-09-30 | 2019-01-22 | 江苏农林职业技术学院 | A method of using potassium permanganate and the combined reinforced coagulating treatment black and odorous water of diatomite |
| CN111573804A (en) * | 2020-05-18 | 2020-08-25 | 南京博斯特环保科技有限公司 | Medicament for fast blackening and deodorizing river channel and preparation method and application thereof |
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